div {
  width: 500px;
  height: 500px;
  background: #006600;
  overflow: hidden;
}

div p {
  width: 100px;
  height: 100px;
  background: red;
  float: left;
  text-align: center;
}

div p a {
  display: block;
  width: 50px;
  height: 50px;
  background: #006600;
}

div span {
  width: 200px;
  height: 200px;
  float: right;
  background: rosybrown;
}
